airvalve
nounUK /ˈeəvælv/
US /ˈervælv/
A small part that lets air go in or out of something.
The ball was flat, so Dad used a pump on the air valve to fill it up.
RELATED WORDS
OTHER MEANINGS
2. A valve that controls the flow of air into or out of a tire or inner tube.
He checked the air valve on his bike tire before riding.
3. A device on a musical instrument that lets air pass through to change the sound.
The trumpet player pressed the air valve to play a higher note.
4. A valve in a heating or cooling system that releases trapped air.
The plumber opened the air valve to let the trapped air out of the radiator.